Multicylinder internal-combustion engine.



aufm. MULTICYLINDER INTERNAL COMBUSTION ENGINE.

APPLICATION mso Aue. lo. 191|.

Patentd Da. M, 1915.

2 NHEETS-SHEET I.

1 l l Il I. .v .W )y lav GUMT. MULTlCYLI'NDER (INTERNAL CGWPBUSTIONENGINE.

APPucAnoN vman Aue. lo. 1911.-

]Patentd Dec. 14, 1915.

2 SHEETS-SHEET 2.

AND (GUR'ET, 01E PARS, FRANCE.

MULTCYLINDER INTERNAL-COMBUSTON ENGINE.

msnm

Specification of Letters latent.

Patented Der., lill, lnl..

Application tiled August `lll, 1911. .Serial No. 643,440.

.To all whom it 'may concern.'

Be' it known that il, Annan Gunner, engineer, a citizen of the Republicyof France, residing at 1 Rue Ficot, aris, France, have invented certainnew and useful improven ments in Multicylinder internal-CombustionEngines, ot which the following is a specification.

This invention relates to :tour stroke cycle internal combustion engineswith several cylinders, and distribution by such means as slide valvesproper or dat valves, and, more particularly, sleeve valves or liners.

One ohiect of the invention is to enable the use in such engines,without necessitat ing a concurrent increase of the amount ofclearances, the arrangement already specitied, while maintaining theusual arrangement of the connecting rods and of the re` spective pistonsof the various cylinders of the said engines, and providing for each ofthe said cylinders only one slide valve without bringing about anypremature uncovering of the ports, the slide valves used being arrangedin a pair or pairs in such a manner that both the admission and exhaustof gases are controlled by the corresponding slide valves.v v

'lhe invention consists substantially in using in the engines of theclass specified such mutual arrangement of the slide valves that thetime each cylinder is controlled hy the noncorresponding slide' valvesis regnlatcd by 'the corresponding slide valve; or, in a similar mutualarrangement of the said slide valves, and particular. association of thesaine relatively to the corresponding respective pistons,- that thelatter will contribute to the 'fulfilment of the function of the saidslide valves.

The invention rfurther consists in the constructions and arrangementswhich will be understood from the following description and theaccompanying drawings which illus# trate preferred structures embodyingthe inveution.

Figure 1 is a vertical-axial section on the line 1 1 ot Fig. 2 of avertical two-cylinder engine embodying the features of 'the invention.Fig. 2 'is a vertical section on the line Q-Q of Fig. 1 or in a plane atright angles to that shown by the latter ligure. Figs. 3, il and 5 showrespectively in horizontal cross section on the line 3-3 of Fig. 1, insimilar section on the line fle-el of Fig. il, and in similar section onthe line 5 5 of lTig. l, the saine engine. lIl ig. is a vertical sectionon the line 6-36, Figs. 3,14 and 5. Figs. 'l' and 8 are detailperspective views of the sleeve valves.

According to the features of the invention to which the drawings moreparticularly refer, and when it is desired to construct a verticalinternal combustion two cylinder engine with four-stroke cycle andsleeve valves, the construction is as follows:

d and a? designate a pair of twin'cylinders which are made of such ahere that it is possible to insert between them and the pistons l1 andb2 sleeve valves c and c2, and the whole is provided in the web a, whichis common to the two cylinders, with a pair of ports al and d2 passingthrough the said web and situated in one and the same horizontal plane.@ne of these `ports is located at the front of the web a and the otherat the back of said part.

vIn the cylinders a and a2 two ports e and e2 are provided, one tor eachof the cylinders, situated, like the ports al and d2 in the .samehorizontal plane and extended toward the front by respective conduits fand f2, by means of which the said ports e and 2 are connected to abranch g arranged in such a manner that it can be utilized as a commonor joint inlet branch.

ln those parts of the device which adjoin the said web a, arc providedtwo ports. h and h2, one for each of the cylinders, and situated indifferent horizontal planes, the port h being located adjacent to therear portion and near the bottoml of the' cylinder e and extended'toward the rear by a conduit i connected to'a branch li2 arranged insuch manner that it can he utilized as an exhaust branch for thecylinder a?. The second port h2 is located at the front and near the topof the cylinder a2 extended toward the front by a conduit 1I connectedto a branch j arranged in such a manner that it canf be utilized as anexhaust branch for the port cZ, and said sleeve is also provided with arecess Z2 in the lower portion of the outer surface which produces withthe said web a of the cylinders a conduit m2 of such construction thatwhen the upper edge of the said recess is at a higher level than that ofthe ports cZ and (Z2, it establishes communication between the second ofthe said ports and the conduit 2, Vand consequently the branch i2.

The sleeve valve c2 has a port 7a2 of such construction that it can bebrought to coincide with the port e2 of the cylinder a2, and a port'Z3such that it can be similarly brought to coincide with the port d2 andprovided with a recess in the upper part of its outer surface whichproduces with the said web a of the cylinders a conduit m', and when thebottom edge of the said recess is at a lower level than that of theports d and Z2 it establishes communication of the port eZ with theconduit z" and consequently with the branch j.

The sleeve valves c and c2 are introduced 4from the top after theremoval of 6the re- .of 18()o relatively to each other. The valve,

v sleeves or liners c and c2 are connected in the same way, by means ofthe said sleeves n and n2 and connecting rods g and g2 to the cranks rand r2 of an additional crank shaft r having the said cranks thereofarranged at an angle of 90 relatively to each other, the crank shaft 1being connected in and of course, as is obvious, in a substantiallysimilar manner as regards the cylinder a2.

Assuming in the first place that the various movable parts are in thepositions in which they are shown in Fig. G corresponding to the end ofexhaust in the cylinder a in question, there will take placesuccessively: First, there is an ascent of the liner c, and Awhen itarrives at the top of the stroke there is coincidence between its port-Za and port e', and communication between its port- Z and the port Z iscut olf; and when' a descent of the piston b takes place, a suction isset up through the conduit f into the branch g. rl`hen, and upon further.descent of the liner c, the coincidence between its port la and theporty e is broken, and communication between its port Z and the port cZis not restablished; and also, such a continuation of the descent of thepiston b that it arrives approximately at the moment of breaking of thesaid coincidence at the bottom of the stroke which corresponds to theend of the suction. Then, there occurs such a continuation of thedescent of the liner cthat communication between its port Z and the porteZ is reestablished, and at the same time such movement of the liner c2that the lower edge of its recess assisting informing the conduit m',which edge had been already made previously to pass the upper edge ofthe port UZ', should remain above the said upper edge of the port (Z,and also such a renewed rising of the piston b that it producescompression of the charge drawn in during the preceding stroke, whichcompression is rendered possible by the obturation effected by the liner6".

Then, such a continuation of the various movements just referred tooccurs that thev piston Zi first arrives at the position of ignition,Yand then atthe top of the stroke, the ports c and Z remaining at thesame time disconnected, the former without any assistance from the portc and the latter being disconnected from the conduit m by the liner c2.

lhen, the liner c arrives at the bottom of the stroke and rises again,without this leading in practice to any particular result, either asregards the port 7c or the port Z', which both remain in the same stateas that referred to in the preceding paragraph, and for the samereasons; and also the piston b descends again and is thus made toaccomplish its working stroke. Then` the rising of the liner c continuesso that communication is resablished between its port Z and the portal', and simultaneously such a shifting of the liner c2 occurs that thebottom edge of its recess contributmamut ing to the formation .of theconduit m moves below the upper edge of the said port d', thusestablishing communication between the interior of the cylinder a andthe said conduit m, and consequently the exhaust branch jv; also acontinuation of the renewed descent of the piston Z/ is effected and alead produced ,in the exhaust, the piston b thus being made -tocolnplete its working stroke. Then, such a continuation of the variousmovements just referred to is produced that after having returned to thebottom of the stroke, the piston by rises again, producing exhaust, theport 7u remainingat the same time disconnected without any assistancefrom the port c, and the port l in communication, by means ofV the linerc2, with the conduit m. Finally, such a continuation of the renewedrising of the liner c is etl'ected that it passes at one side with thelower edge of its port l the upper edge of the port cl, andconsequentlyshuts otf communication of the interior of the cylinder a.with the conduit m and at the other side coincides, as regards the upperedge of its port c, with the lower edge of the port' c.; and also such acontinuation of the renewed rising of the .piston b is effected that itagain arrives at the top of the stroke, the whole corresponding tothereturn of the various movable parts to their initial position.

The particular method of construction above described makes 'it possibleto insure a very great perfection of working. Still better results can,however, be obtained by adopting, as has been assumed to have been niadein the example illustrated in the drawings, in addition to thearrangements already described, such an arrangement, with regard to thechoice of position of the ports to be lnade in the cylinders relativelyto that which the respective pistons of the same cylinders occupy at thetop of the stroke in the same, that the said pistons, as shown by I `ig.(5, themselves act as obturating devices, more particularly from themoment of the ignition to a certain point ot the working` stroke. Inthat way the said ports, or more particularly those of the sleeve\,'alves, are protected from contact with hot gases during the time whenthe gases in question have the highest temperatures, so that the portsin question are better protected, and, moreover, a kind of concentrationof the force produced by the explosion on the piston is'olitained.

lt is obvious that the invention is by no means limited to those detailsof construction which have been more particularly described. butcomprises, on the contrary, all modifications, namely those where, inview ot' its application to six-cylinder engines, the six cylinders tobe used are formed into also having exhaust ports, a web between thecylinders having a pair of ports adapter to haveindividual communicationwith the like ports of the cylinders adjacent thereto, and sleeve valvesmovably mounted inthe cylinders also provided With ports andindividually Vand simultaneously operable in such manner that eachsleeve valve controls the inlet and exhaust of its cylinder and also oneof the ports of the companion cylinder.

In a four-cycle multi-cylinder internal combustion engine, thecombination of a pair of cylinders, a slide valve reciprocably mountedin each cylinder, a piston in each slide valve, the cylinders eachhaving a port communicating with a common inlet branch, the cylindersalso having exhaust ports` a web between the cylinders having a pair ofports to communicate with exhaust ports of the cylinders adjacentthereto, and means for operating the slide valve and piston of eachcylinder in connected relation in such manner `that the piston coversthe inlet and exhaust portsl of the said slide valve at the end of thecompression stroke and at the beginning of the working stroke.

3, In a four-cycle multi-cylinder internal combustion engine, a pair ofcylinders, each cylinder having an inlet port provided in the fwallthereof, acommon inlet branch communicating with said cylinder inletports, the cylinders also having exhaust ports, a web between the saidcylinders provided with two horizontal ports, a slide valvereciprocating in each cylinder and each having an inlet portcorresponding to the inlet port of its cylinder, the said slide valvesalso being each provided with an exhaust port individuallycorresponding-to one of the horizontal ports of the web and alsoprovided with a'recess to correspond to the remaining horizontal port ofthe Web, a reciprocating piston in each slide valve, the web also havingtwo exhaust conduits respectively above and below the said horizontalports thereof to individually coperate with the respective recesses ofthe slide valves, and means for controlling the reciprocating motion ofthe slide valves whereby each of said valves control the inlet and eX-haust ports of its respective cylinder `and simultaneously controls theexhaust of another cylinder.

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4. In an engine of the character specified, its respective slide valveat the end of the the combination of a pair of Cylinders procompressionstroke of said piston and at the vided 'with exhaust and inlet ports,`aslide beginning of the working stroke. valve reeiprocatingly mounted ineach cyl- In testimony whereof I have hereunto set:

5 inder and having ports to control the ports my hand in presence of twosubscribing wit- 15 of its respective cylinder, a piston in each nesses.

slide valve, and means for operating the ANDR GURET. slide valve andpiston of each cylinder in Witnesses: Connected relation in such mannerthat the H. C. COKE,

10 piston covers the inlet and exhaust ports of PAUL BLUM.

